Bailer



Feb. 16, 1932.

LEROY F. v KIME ET AL.

BAILER Filed Aug. 13, 1928 Patented Feb. 16, 1932 UNITED STATES PATENT OFFICE LE nor 1r. ma Am) :man r. UBI., or EAn'rLEsvILLE, OKLAHOMA BAILEB Appunti@ med Au'gm is, 192s. serial m. 299,304.

'Our invention relates to bailers and more particularly to a device of that character em ployed in oil -well drillin and pumping practice for taking sam les ofi fluid and removing cavings and the l' e from the bottom oi a well; the principal object of the invention being to increase the intake efficiency of a bailer of the reciprocable plunger type by including in the plston a plurality of valved 10 relief ports whereby fluid is admitted to the rtion of the barrel above the piston on the dgwnstroke, for effecting a fluid seal between the iston and b arrel duringthe upward or int e stroke.

In accom lishing these and other objects of the invention we have provided improved details ofstructure the preferred forms of which are illustrated in the accompanying drawings, wherein:

Fig. 1 is a central vertical section through the lower ortion of an Oilwell showing our improved ailer applied therein, parts of the bailer being broken away for better illustration. 25 Fig. 2 is an enlarged longitudinal section through the bailer showing the piston at the upper limit of its travel with the valves closed.

Fig. 3 is a section on the line 3-3, Fig. 2.

Fig. 4 is a section on the line 4-4, Fig. 2.

Fig. 5 is a detail perspective view of the base shoe.

Referring in detail to the drawings:

1 designates the lower portion of an oil well including the usual shot hole 2 formed in the oil sand 3 below the cap rock 4, the portion of the well above the shot hole being lined with casing 5 supported on the cap rock by a shoe 6.

The bailer includes a barrel 8 suiciently smaller in diameter than the interior of the casing to permit its free passage through a column of fluid in the casing, and sucient in length to receive a quantity of fluid and to accommodate a plunger and cable connector as hereafter described.

The barrel 8 has a closed upper end 9 provided with an upwardly protruding neck 10 having the usual peripheral corrugationsll for engagement bv fishing tools, anda central openin 12 for a supporting line 13. The wall o the barrel is provided adjacent its upper end with elongated ports 14 for outlet of fluid and at`its lower end with bayonet slots 15 for the attachment of a base shoe 16.

The base shoe 16, which is removabl attached to the barrel, comprises a shouldered cylindrical body including a lower portion 17 equal in diameter to the barrel, a reduced upper portion .18 `fitting within the barrel, and the intermediate shoulder 19 formed be tween the u per and lower portions and engaging the bottom edge of the barrel Whenv the part-'s are assembled. ,l

Formed integrally with and protruding outwardly from the wall of the upper body portion 18 are equally spaced bosses 20, 21 and 22 engageable with the bayonet slots 15 for supporting the base shoe in assembled relation. with the barrel.

Formed in the wall of the body portion 18 at one side of the boss is a slot 23 extending downwardly into the lower portion 17 of the shoe, and located in the upper portion of the slot is a latch 24 pivotally mounted on a pin 25 75 Y extending through-the lower end of the latch and throu h the slot at a point slightly below the shouler 19.

A flat spring 26 fixed in the lower end of the slot 23 enga es the inner side of the latch 24 for yieldingly urging the latch into engagement with the vertical portion of a bayonet slot 15 when the shoe is assembled on the barrel, thereby preventing rotation of the shoe relative to the barrel, andretaining the bosses in the horizontal'portions of the bayonet slots for supporting the base shoe on the barrel.

In order to further insure the retention of the base shoe in its assembled relation with n0 the barrel, we provide threaded openings 27 and 28 in the wall of the upper portion 18, the openings 27 being located opposite the slot 23 and fitted with an adjustable locking pin 29 extending through an opening in the U5 wall of the barrel and engaging the inner surface of the flat spring to prevent depression of the latch when the members are assembled, the Opening 28 being located at one side of the boss 21 and tted with a screw 10Q 30 protruding into a bayonet slot and engaging the side edge of said 'slot opposite the edge engaged b said boss and serving to cooperate with t e latch in preventin rotation of the base shoe relative to the arrel.

A tapered opening 31 extends longitudinally through the base shoe, and ports 32 in the wall of the lower ortion 17 communicate with the opening an serve as inlets for the fluid. Hingedly mounted on the top of the shoe is a flap valve 33 adapted for normally closing the opening V31 and preferably having a tapered portion 34 for seating in a tapered seat 35 at the top of the opening.

Reciprocably mounted in the barrel is a plunger including a cylindrical body 36 provided on its outer surface with vertically spaced annular grooves 37, and having a central longitudinal opening 38 engaged by a rod 39. The rod 39 is provided with an upper enlarged portion 40 threaded at its upper end and having a shoulder 41 engaging the top end of the plunger, the lower end of the rod being threaded and engaged b'y a nut 42 whereby the rod is secured in the plunger.

Equally spaced channels 43 extend vertically through the plunger, and a plate valve 44 slidably mounted on the enlarged portion 40 of the rod 39 is adapted for opening and closing` the upper ends of the channels when the plunger is in operation.

Threadedly engaged on the upper end of the rod portion 40 is a socket 45 locked to the rod by a nut 46 and having a tapered central opening 47 in which the bottom end of the cable 13 is secured by means of solder or like metal which may be poured into the opening between the spread strands loi the cable. The upper end of the socket is engageable with the closed end of the barrel for supporting the assembled bailer.

When the bailer, assembled as described, is being lowered into a well, the socket 45 engages the upper closed end of the barrel 8 as shown in Fig. 2. The valves 33 and 44 remain closed until the column of fluid in the casing is encountered, whereupon the valves open to admit the fluid into the barrel 8 and permit passage of the iluid through the outlet ports 14. When the base shoe 16 arrives in engagement with the bottom of the shot hole and arrests downward travel of the barrel 8, the valve 33 closes and continued downward movement of the cable 13 causes the piston suspended from the cable to continue downwardly in the barrel as shown in Fig. 1, the valve 44 on the piston remaining open to permit iiuid trapped below the piston to pass into the portion of the barrel above the piston.

-As the piston is lifted upwardly in the barrel, the valve 44 closes so that part of the fluid above the piston is forced out through the outlet ports 14 and a portion of the iuid the piston and barrel to be intercepted by the annular grooves 37, thereb eiecting a iiuid seal between the members, tire suction created by the piston causin a iuid charge to be drawn into the barrel elow the piston. Continued upward movement of the cable line 13 brings the socket 45 into engagement with the top of the barrel so that the bailer with its colained iuid charge may be lifted from the we What we claim and desire to secure by Letters Patent is:

1. A pipe joint including an outer pipe having a bayonet slot, an inner pipe removably attached to the end of the outer pipe 2. In a device of the character describedk including telescoping pipes having a bayonet joint therebetween and a spring supported latch yieldingly urged into latched engagement with one of lsaid pipes to latch the pipes in joined relation, a transverse locking pin in latched relation. i j

3. In a device of the character described, outer and inner telescoping ipes having respectively a bayonet slot and) a lug cooperating with said slot to forni a bayonet joint, the inner pipe having an outwardly opening recess, a latch pivotally mounted in said recess, a spring yieldingly urging the latch into latched engagement with the outer pipe, and a locking pin having adjustable mounting on the inner pipe and having a portion engageable with said spring for securing the latch in its engagement with the outer pipe.

4. A pipe joint including an outer pipe having a bayonet slot and an inner pipe telescopingly receivable in the outer pipe and having a lug receivable in said slot to form a bayonet joint, said inner pipe having an outwardly opening recess, a latch having pivotal mounting on said inner pipe and movable through the longitudinal portion of said bayonet slot into and out of said recess, a spring located in said recess and bearing against one end of said latch to urge the same to move pivotally into the recess, and means movably mounted in said inner pipe for limiting movement of the latch into the recess.

5. In a device of the character described including teles'coping tubular members having respectively a slot and a lug'movable in said slot to form a bayonet joint, a latch hinged to one of said members having a portion movable into said slot to stop said lug for locking the members in joined relation, a spring bear- 95 cooperating with the latch to retain the pipes ing against said latch to urge the same into the slot, and movable means for limiting movement of said latch into the slot.

6. In a device of the character described, a pipe end portion having a bayonet slot including longitudinal and lateral portions, a pipe end portion telescoped in said first named pipe end portion having a recess registering with the slot of the first named pipe end portion, a lug on said second named pipe end portion receivable in said bayonet slot, a latch having hinged mounting on said second named pipe end portion and including a portion movable through said longitudinalportion of the bayonet slot into the recess of the second named pipe end portion, a spring operating in said recess and bearing outwardly against the latch, means anchoring the spring to said second named pipe end portion, and means including a pin extending transversely through the second named pipe end portion and having an end extending into said recess and a portion vto engage said spring for limiting movementV of the latch into said recess.

7. In a device of the character described including an apertured upper pipe having a bayonet slot in its lower end including longitudinal and lateral portions, a lower pipe having a reduced upper end receivable in the upper pipe and a shoulder to engage the lower end edge thereof, andprovided with a longitudinal recess including an upper end registering with the longitudinal slot portion ofthe upper pipe and lower end, a lug on said reduced end of the lower pipe at one side of the up er portion of said slot therein, and receiva le in said bayonet slot to form a bayonet joint, a latch including a lower end lo cated in the lower end of said recess and an upper end movable through said longitudinal bayonet slot portion into the upper end of said recess, a pin extending through the lower end portion of said latch and having opposite ends mounted in the side walls of the lower end of said recess for pivotally supporting the .latch for pivotal movement through the slot of the upper pipe into the upper end of said recess, a spring in said recess and bearing against the lower end of the latch to urge the upper end thereof through the upper pipe slot into the upper end of said recess, means anchoring the lower end of the spring to the bottom of the lower end of said recess, a pin extending transversely through the aperture of the upper pipe including a portion threadedly engaged with the lower pipe and an end portion extending sufficiently into the upper end of the recess to engage said spring for limiting pivotal movement of said latch into the upper end of said recess.

In testimony whereof we aflix our signatures.

LE ROY F. KIME. FRED F. UHL. 

